Structural design and experiment of submerged pump with magnetic fluid seal
Guan Hongyan1,Yang Fengyu2,Wang Qilei1
(1.College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050,China;2.Magnetism and Magnetic Technology Research Institute,Lanzhou University of Technology,Lanzhou,Gansu 730050,China)
Abstract： In order to solve the leakage problem of colorless and virulent hydrogen fluoride in the transportation process of nuclear raw materials of submerged pump,magnetic fluid sealing technology was introduced.A set of sealing structure adopting screw tooth was designed,and design formulas of seal pressure differential were deduced.Through theoretical analysis and experimental investigations,the impact of rotation speed,temperature,magnetic fluid volume,sealing clearance and magnetic field intensity on sealing loading capacity of magnetic fluid in liquid working environment were discussed.The results show that the loading capacity decreases while rotation speed,temperature or sealing clearance increases.The higher the magnetic field strength,the higher the loading capacity.The maximum experimental value of loading capacity is 8×105 Pa.Besides,the loading capacity enlarges while magnetic fluid volume increases.But when magnetic fluid volume exceeds a critical value,the sealing loading capacity will have no change and maintain at a constant value.The leakage problem of virulent hydrogen fluoride will be effectively solved
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